Dumortierite and Londonite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.26-3.41
3.34
Fracture
Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references
ConchoidalAnthony et al, Handbook of mineralogy (2001), ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Cleavage
Distinct on {100}, poor on {110}; parting on {001}
None
Mohs Hardness
7-8.5
Not Available
Chemical Composition
AlAl6O3BSi3O18
(Cs,K,Rb)Al 4Be 4(B,Be) 12O 28Anthony et al , Handbook of mineralogy (2001)
Dumortierite and Londonite Chemical Formula
While comparing Dumortierite and Londonite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Dumortierite and Londonite chemical formula.
- Chemical formula of Dumortierite- AlAl6O3BSi3O18
- Chemical formula of Londonite- (Cs,K,Rb)Al 4Be 4(B,Be) 12O 28Anthony et al , Handbook of mineralogy (2001)
Dumortierite and Londonite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Dumortierite and Londonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dumortierite and Londonite Optical Properties during the identification of gemstone. Specific gravity of Dumortierite is 3.34 whereas that of Londonite is 3.34.